Regulating-valve.



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JOSEPH SCHNEIBLE, OF NEW YORK, N. Y.'

REGULATING-VALVE.

SPECIFICATION forming part of Letters Patent No. 633,662, dated September 26, 1899.

Application filed July 24, 1899. Serial No. 724,892. No model.)

To (LZZ whom it may concern.-

Be it known that I, JOSEPH SCHNEIBLE, a citizen of the United States, residing in the borough of Manhattan,city of New York,State of New York, have invented certain new and usefulImprovementsinRegulating-Valves,of which the following is a specification, reference being had to the accompanying drawing, forming a part hereof.

This invention relates to valves which depend for their operation upon the action of a diaphragm subject to the pressure of the fluid controlled by the valve and in which the spring, which in some cases acts upon the diaphragm in opposition to the pressure of the fluid, is dispensed with, the diaphragm itself being subject to fluid-pressure on both sides.

The objects of the invention are to produce a compact'and simple valve without external parts and to promote convenience and reduce cost in manufacture, while providing a reliable and sensitive valve.

The invention is illustrated for purposes of explanation in the accompanying drawing, which represents a vertical central section of a valve which embodies the improvements.

The main valve A is of the balanced variety, having a double seat a a, with which cooperates a valve-plug B, formed in the usual manner, except as hereinafter indicated. The diaphragm shell or chamber G is supported directly upon the body A of the main valve, the neck A between the body of the valve and the valve-chamber forming a guide in which the valve plug or stem is free to move. The diaphragm D may be secured, as usual, between the two parts of the diaphragm shell or chamber and is connected to the valve plug or stem B, as by means of the heads or plates G. Both chambers on opposite sides of the diaphragm communicate with the discharge side of the main valve through the valve stem or plug 13, which is bored axially, a restricted port or passage Z1 communicating with the chamber above the diaphragm, while another port or passage b communicates with the chamber below the diaphragm.

A regulating-diaphragm chamber E is suitably supported upon the main diaphragm chamber 0, virtually forming, with the upper part thereof, one chamber, and communicates through a passage 5 with the supply side of the main valve. The passage of the fluid into the chamber E is controlled by a valve-plug F, which is carried by the regulating-diaphragm G. The latter is suitably supported between the shell or chamber E and the springbox H and is acted upon in opposition to the fluid-pressure within the shell or'chamber E by a spring I, the pressure of the spring being regulated by a hand-screw K and follower 7c in the usual manner. This diaphragm G may be much smaller than the diaphragm D and is easily removed and replaced whenever necessary.

The operation of the improved valve is as follows: It beingassu med that the hand-screw K has been turned backward until the diaphragm G has been relieved from the pressure of the spring I, the tension of the dia phragm itself will cause the valve F to close the passage 6. There being then no overpressure on the upper side of the diaphragm D, the tension of this diaphragm D, assisted, if necessary, by a spring B, will close the main valve at a a. As soon as the screw K is turned to compress the spring I and depress the diaphragm G the passage 6 will be opened by the movement of the valve-plug F. The fluidpressure thus created on the upper side of the diaphragm D will depress the same, opening the main valve at a a. Fluid-pressure will thus be created on the discharge side of the main valve, and through the port or passage b pressure on the under side of the diaphragm D is established, which is nearly equal to the pressure on the upper side of the same diaphragm. A sufficient overpres sure on the upper side of the diaphragm to cause the device to respond quickly to any variation in pressureis maintained by means of the restricted port or passage b between the chamber on the upper side of the diaphragm and the discharge side of the main valve, which permits the fluid to escape from such chamber less freely than it is admitted thereto.

It will be obvious that upon any decrease in pressure on the discharge side of the valve, and consequently on the under side of the diaphragm D, the valve-plug B will be lowered and the area of the valve-opening increased, while in case of any increase in pressure on the supply side of the valve the diaber E will be decreased to the same extent, I

the diaphragm G Will be depressed under the action of the spring, the opening of the valve F Will be increased, the overpressure on the upper side of the diaphragm D Will be increased, the diaphragm D will be correspondingly depressed, and the area of the valveopening at a a increased. The pressure on the discharge sideof the main valve is thus maintained substantially uniform at all ti mes,

regardless ofvariations of pressure on the supply.

The subjection of both sides of the main diaphragm to nearly equal fluid-pressures prevents any buckling 0r strainingof the dia phragm, and, moreover, the pressures on opposite sides are distributed equally over all portions of the diaphragm, while in the case of a diaphragm supported bya spring the pressure on the spring side is applied only to an area equal to the eitective area on the supporting-plate.

The action of the main or operating diaphragm is of course controlled or regulated by any suitable means, such as the supplemental diaphragm spring and adjustingscrew shown; but even if a supplemental diaphragm is employed it will be seen that the operating-diaphragm is much larger and can be made much lighter than a spring-supported diaphragm of the same size.

there is no chance for interference with the operation of the valve by accumulation of Water of condensation.

I claim as my invention- 1. A regulating-valve comprising a valve plug and seat, a diaphragm to which said valve-plug is connected, chambers on opposite sides of said diaphragm, said valve-plug having formed therein a passage communicating with said chambers and with the discharge side of the valve, a passage to one of said chambers from the supply side of the valve, and means to control said passage.

2. A regulating-valve comprising a valve plug and seat, a diaphragm to which said valve-plug is connected, chambers on opposite sides of said diaphragm, said valve-plug having formed therein a passage communieating with said chambers and with the discharge side of the valve, a supplemental diaphragm and diaphragm-chamber communieating with one of the first-named chambers, a passage from the supply side of the valve to said supplemental-diaphragm chamber, anda valve connected to the supplemental diaphragm to control said passage.

This specification signed and witnessed this 17th day of July, A. D. 1899.

JOSEPH SOHNEIBLE.

In presence of- ANDREW H. ScoBLE, Louis B. MOORE. 

